CVE-2018-14678: An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x

Description

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack vector

Local

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 35% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

KE

Kernel · Linux

4.14.21 before 4.14.61; 4.15.5 before 4.17.13 · source: NVD

DL

Debian Linux · Debian

8.0; 9.0 · source: NVD

UL

Ubuntu Linux · Canonical

14.04; 16.04; 18.04 · source: NVD

XE

Xen · Xen

through 4.11.0 · source: NVD